iPadOS 8.4.1 (build 12H321) is an official Apple over-the-air update for the iPad mini 2 (WiFi), released on 2015-08-13T18:05:10Z. The update package is 1.2 GB. This is a delta (partial) update that requires 7.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 907319760034a3802efbb5790ae60a4a096c9d7f.zip.